Since we have a limited profile size and the Dropbox install completely fills my profile I would the option to install the application outside the regular path. So not in C;\docs & settings\USERNAME\Application Data.
Works with dropbox 1.4 and up.
1. Open your Registry (regedit)
2. Find key “HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders”
3. Change value “AppData” to “%USERPROFILE%\AppData\Local”
4. Install your dropbox
5. After install change the key back to “%USERPROFILE%\AppData\Roaming”
6. In case needed restart your computer. Dropbox should not be in your roaming profile anymore.